Improvement in sawing-machines



B. OWEN,

Improvement in Sawing-Machines.

Patented June 25,1872

441 PlI07UA/TIIOGRAFIl/C m. A. r: OSEUR/VE'S mocsss,

UNITED STATES PATENT OFFICE.

BENJAMIN ownn, on DAYTON, 01110.

IM PROVEMENT IN SAWlNG-MACHINES.

Specification forming part of Letters Patent N 0. 128,420, dated June25, 1872- lation to the swinging frame and the racks.

This drawing in scale is twice that of Fig. 1.

A represents the saw-frame, which is constructed in the usual manner. Tothe rear of the frame'are' secured the arms Gr, one on each side of theframe. These arms are provided with pivots for the ends of the frame B,and the centers of which form bearings for the counter-shaft. The dottedlines at H show the position of the pulley on the counter-shaft. A beltconnects this with the pulley on the sawmandrel. To the forward part ofthe frame are secured segmental racks D, one on each side having aseries of cogs in front, and an aperture extending nearly the entirelength of the racks. The swinging-frame B is constructed in the usualmanner, having projecting parts, shown by dotted lines at m, which serveas bearings for the saw-mandrel. To the front and under side of thisframe are secured the hangers B and B that of B being on the near side,and B on the opposite side. Thesehangers form the bearing for the shaftof the pinions F on each side, and support the tightening rod E at eachend. The pinions gear into the rack, and outside of the near pinion theshaft terminates in a square end for the orifice of the crank I. (SeeFig. 2.) By means of the crank the pinions are made to rotate, and thusthe saw is carriedup or down, as may be de sired. The tightening-rod E,Fig. 2, has a screw on each end. The screw on the left end enters afemale screw in the part B and the screw to the right enters the nut L.This nut has a flanged part, which rests against the side of the frame,and the other part rests loosely within the aperture of the rack, whichprevents its turning. The head E is flanged and terminates in a squarefor the crank. The rod passes through the aperture of the rack, and theopposite end passes through a circular orifice in the part B. Thepinion-shaft and tightening-rod are both operated by cranks at the sametime, one being operated by the 'right and the other the left hand. 0nturning the crank to the right the rack is clamped between the head Eand part B, and the nut L is brought tightly against the rack on theopposite side; this looks the swinging frame and holds the saw at anydesirable elevation. A counter movement releases the frame.

I claim as my invention- The combination and arrangement of the rod E,nut L, hangers B B pinions F, racks D, and swinging circular-saw frameB, substantially as described.

-BENJAMIN OWEN.

Witnesses:

JOSEPH SERVICE, W. H. CLARK.

